Solenoid.



B, E. FEHNOW, Jn.

SOLENOID.

APPLICATION FILED APR. 18, Ism.

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in Application @led pi caused the piungers to be subjected to me@ iii)netic side puii, especiaiiy where' ibs s0.=eneids are not pmvified withmagnetic plugs. This, in turn7 has resnieii en Fie piunger and iis guide:luci i ien@ ency of nepine-gsi' to siei when ne suienoidis deprivedcurreni.

oii m these resuits are obviously eiijeciion und this invention nasamong i-Ls fibjeczs ai so reineiiy die iiil'resaid @auditions asi@render any weer en *die piu-ts; or sickiug 0i' the piunger negiigibie.

Figure l of the accompanying' drawing, which Shows :i preferredeinbodiuien of fne invention, is :L side View ai: the snienuif.

partially in section, with the plunger in zii-treated position; und Fig.is n 'pian vier: thereof.

The solenoid iliustraeci C general; n winding l,y a piling therein undhaving u limited isierzii .y und :i .magnetic iframe 3 for ne winding,At the ends'of the frame 3 through' wh' the magnetic iiux passes te thepiunger n directiony at right :ingies in the aier9 there is provided anmien of reiuennce if e reutive velue hereinafter set 'forth Thisreluctance is prefernniy in the 'furia (if ivm non-magnetic bushings il:md5 sented in opposite ends 0i' i'ihe frame. to sin-mund in@ plunger.

Referring more specificuiiy to the drewing, he winding 1 is coiie. 0n a,spool (3,

invenien eiiites i0 imprnvemen s customary i60 previde( sieurs) i' is"eier mi) in@ mi nuwe-- el sensu finie side inni die piunsfer u'iiiicunsequeiit wein' mi die pzirrs und u'.in \.'eni wiens-e @if in@piunger. vine ,iusniiufs l und 5, prefer-nini' 0i Tbrass, me 0i suu'hmansions 'nn iie reluci-mure inermi 1.5 i iniively invent u'iii reincr@il (Zue in inf".

iii

525er und sinzil wi cuizipii :is non' :nui rsirr in seizure i. in usuienmii, in muiiiiuuiimu :i wiwi- 1" u uuiguiuir, ira: iureim', :iplunger inovsnirin sani v1 i if: uren-inn iif 1.43.3

I ends 0i said fram@ e unuiur guide im miei piunggor :affording iiinieiimern pzijf in iii@ inusr 'Sfar insuring izs 'iii-ee mm1-filoni. :nui nuon-nwg'netie bushing; :it auch rf: the overu'hich hitter is as thin :isconsisieni .rn iugipeai ends iz'ne winch-.nce 15,05 iis requisitestability in order that infix; if iie nuaxiiru unir nir-iup rosuiimumspace within the irzime 'n ai?! be i. "1 iu piuug-,nr n

iinevi jini; the winding@ und that the su i. sul

thereof muy iie einseiy :ujecent the pi Ln wie ger. A iiin zubuini:einem?? cisti'tub busi;

said Slew@ .l @hmm Ase adjaccn sa 01% the maxlwtnessea BERNHARD dW'itnesses ence of

